diff --git a/modules/study/src/main/Node.scala b/modules/study/src/main/Node.scala
index 30262cc308f4c..72b07322dc34c 100644
--- a/modules/study/src/main/Node.scala
+++ b/modules/study/src/main/Node.scala
@@ -2,7 +2,7 @@ package lila.study
 
 object Node:
 
-  val MAX_PLIES = 400
+  val MAX_PLIES = 600
 
   object BsonFields:
     val ply            = "p"